Method for preparing nanometer copper-sulfur compounds with controllable morphologies based on chemical vapor deposition method

Abstract

The invention belongs to the technical field of the preparation of the semiconductor material and particularly discloses a method for preparing copper-sulfur compound nano-crystals with controllable morphology based on a chemical vapor deposition method. The method adopts the chemical vapor deposition method, the temperature and pressure of the reaction system and the product collection area are controlled to prepare different morphologies of copper-sulfur compounds such as copper sulfide nano-crystals, copper sulfide nano-rods, copper sulfide nano-sheets and copper sulfide nano-flower-cluster. The method comprises the following specific steps: (1) injecting a solid precursor; (2) controlling the pressure and temperature of the system and injecting a gaseous precursor; and (3) collecting the product. The copper-sulfur compounds prepared by the method are characterized by good monodispersity, high sample purity and the like. The method can also be used to prepare other metal semiconductors such as sulfides, selenides and tellurides; and by changing the reaction conditions of the system, the morphology of the product is regulated and then applied in fields such as the preparation of functional semiconductor elements, photoelectric conversion and catalysis.

Description

technical field [0001] The invention belongs to the technical field of semiconductor material preparation, and in particular relates to a method for preparing a shape-controllable nanometer copper-sulfur compound. Background technique [0002] Copper-sulfur compounds are an important class of indirect bandgap p-type semiconductor materials, and their forbidden bandwidth is between 1.2–2.2eV at room temperature, which changes with the copper-sulfur ratio. Nano-copper-sulfur compounds have optical properties such as visible light absorption, infrared transmission, photoluminescence, and large nonlinear polarizability, and are favored in the fields of solar cells, new photocontrol devices, photocatalysts, and photoelectrodes. At the same time, it has the characteristics of high electrical conductivity and high capacitance, so it is an excellent cathode material in lithium-ion batteries. In addition, nano-copper-sulfur compounds can also be used as good low-temperature supercon...

AI Technical Summary

Problems solved by technology

However, there is still no method that can easily realize the separation of copper-sulfur compounds with different morphologies and the precise control of their morphologies by adjusting the parameters of the system in one reaction system.

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